目录

前言：遇到这种问题，从字面意思来讲是因为文件太大，超过了文件的预留长度

一、再现场景：

二、排除错误：

三、解决办法：

        1、第一种：修改yml文件中的证书密码：

        2、第二种：在依赖中加入maven-resources-plugin组件依赖

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前言：遇到这种问题，从字面意思来讲是因为文件太大，超过了文件的预留长度

一、再现场景：

将http请求转变为https请求，再将密钥和yml配置进去之后，启动项目就报错

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2022-07-01 11:59:52.741 ERROR 12360 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.context.ApplicationContextException: Failed to start bean 'webServerStartStop'; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat server
	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:181)
	at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:54)
	at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356)
	at java.lang.Iterable.forEach(Iterable.java:75)
	at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:155)
	at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:123)
	at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:940)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:591)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:144)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:767)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:426)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:326)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1311)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1300)
	at cn.jnu.agent.ServerApplication.main(ServerApplication.java:14)
Caused by: org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat server
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.start(TomcatWebServer.java:229)
	at org.springframework.boot.web.servlet.context.WebServerStartStopLifecycle.start(WebServerStartStopLifecycle.java:43)
	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:178)
	... 15 common frames omitted
Caused by: java.lang.IllegalArgumentException: standardService.connector.startFailed
	at org.apache.catalina.core.StandardService.addConnector(StandardService.java:244)
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.addPreviouslyRemovedConnectors(TomcatWebServer.java:282)
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.start(TomcatWebServer.java:213)
	... 17 common frames omitted
Caused by: org.apache.catalina.LifecycleException: Protocol handler start failed
	at org.apache.catalina.connector.Connector.startInternal(Connector.java:1067)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.StandardService.addConnector(StandardService.java:240)
	... 19 common frames omitted
Caused by: java.lang.IllegalArgumentException: DerInputStream.getLength(): lengthTag=111, too big.
	at org.apache.tomcat.util.net.AbstractJsseEndpoint.createSSLContext(AbstractJsseEndpoint.java:99)
	at org.apache.tomcat.util.net.AbstractJsseEndpoint.initialiseSsl(AbstractJsseEndpoint.java:71)
	at org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:216)
	at org.apache.tomcat.util.net.AbstractEndpoint.bindWithCleanup(AbstractEndpoint.java:1159)
	at org.apache.tomcat.util.net.AbstractEndpoint.start(AbstractEndpoint.java:1245)
	at org.apache.coyote.AbstractProtocol.start(AbstractProtocol.java:603)
	at org.apache.catalina.connector.Connector.startInternal(Connector.java:1064)
	... 21 common frames omitted
Caused by: java.io.IOException: DerInputStream.getLength(): lengthTag=111, too big.
	at sun.security.util.DerInputStream.getLength(DerInputStream.java:606)
	at sun.security.util.DerValue.init(DerValue.java:391)
	at sun.security.util.DerValue.<init>(DerValue.java:332)
	at sun.security.util.DerValue.<init>(DerValue.java:345)
	at sun.security.pkcs12.PKCS12KeyStore.engineLoad(PKCS12KeyStore.java:1941)
	at java.security.KeyStore.load(KeyStore.java:1445)
	at org.apache.tomcat.util.security.KeyStoreUtil.load(KeyStoreUtil.java:69)
	at org.apache.tomcat.util.net.SSLUtilBase.getStore(SSLUtilBase.java:216)
	at org.apache.tomcat.util.net.SSLHostConfigCertificate.getCertificateKeystore(SSLHostConfigCertificate.java:207)
	at org.apache.tomcat.util.net.SSLUtilBase.getKeyManagers(SSLUtilBase.java:282)
	at org.apache.tomcat.util.net.SSLUtilBase.createSSLContext(SSLUtilBase.java:246)
	at org.apache.tomcat.util.net.AbstractJsseEndpoint.createSSLContext(AbstractJsseEndpoint.java:97)
	... 27 common frames omitted

Disconnected from the target VM, address: '127.0.0.1:59006', transport: 'socket'

Process finished with exit code 1

出现了两种类型的错误，第一种就是tomcat启动不成功，第二种就是超出了范围，第一种错误不用管，springBoot自带Tomcat，内部的Tomcat不会报错，主要是解决第二个错误

二、排除错误：

一步一步排除错误，这种错误不好用debug去发现错误出现在哪个地方，首先排除第一步，导入密钥，启动项目，没有报错，第二不配置yml文件，启动之后报错

三、解决办法：

        1、第一种：修改yml文件中的证书密码：

  ssl:
    #  支持https
    enabled: true
    key-store: classpath:gourd.p12
    key-store-password: 123456
    key-store-type: pkcs12
    key-alias: gourd

                    将密码改成了：123456，问题解决。（原密码：gourd123）

        2、第二种：在依赖中加入maven-resources-plugin组件依赖

报错原因：maven编译打包项目的时候忽略指定后缀的文件，所以关于密钥的文件没有被扫描到

                    对maven-resources-plugin组件的说明

这个插件的作用是在maven编译打包项目的时候忽略指定后缀的文件，秘钥如果不忽略就会被编译，编译后就会出问题

maven对它支持的几种类型外在编译的时候会对其他文件改写里面的内容

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <configuration><encoding>UTF-8</encoding>
                    <!-- 过滤后缀为pem、pfx的证书文件 -->
                    <nonFilteredFileExtensions>
                        <nonFilteredFileExtension>p12</nonFilteredFileExtension>
                        <nonFilteredFileExtension>cer</nonFilteredFileExtension>
                        <nonFilteredFileExtension>pem</nonFilteredFileExtension>
                        <nonFilteredFileExtension>pfx</nonFilteredFileExtension>
                    </nonFilteredFileExtensions>
                </configuration>
            </plugin>

 问题解决！